28801001856 has 512 divisors, whose sum is σ = 91822325760. Its totient is φ = 7907328000.

The previous prime is 28801001839. The next prime is 28801001881. The reversal of 28801001856 is 65810010882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 219854911 + ... + 219855041.

It is an arithmetic number, because the mean of its divisors is an integer number (179340480).

Almost surely, 2^28801001856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28801001856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45911162880).

28801001856 is an abundant number, since it is smaller than the sum of its proper divisors (63021323904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28801001856 is a wasteful number, since it uses less digits than its factorization.

28801001856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 28801001856 in words is "twenty-eight billion, eight hundred one million, one thousand, eight hundred fifty-six".